Button cell battery Maxell BAT371.MX1 SR920SW 1.55V Silver Oxide

Maxell BAT371.MX1 SR920SW is a silver oxide button cell battery with a nominal voltage of 1.55 V designed for small electronic devices. Its compact SR920/SR69 size and consistent output make it suitable for precision instruments that require stable short-term power. The battery is intended as a replacement for devices specifying SR920SW geometry and 1.55 V rating and is produced to meet common performance expectations for silver oxide chemistries.

Advantages

This silver oxide cell offers stable voltage over most of its discharge cycle and relatively low self-discharge compared with alkaline button cells, which helps preserve device calibration and timing. The chemistry provides reliable performance in compact housings and is compatible with common contact designs used in watches, calculators and small medical instruments. The battery’s compact form factor and predictable discharge characteristics simplify replacements and maintenance for devices built to the SR920SW size.

Suitable for (tasks / use cases)

• Analog and digital wristwatches
• Small calculators and electronic organisers
• Hearing aids and compact medical monitoring devices (when specified)
• Laser pointers, small toys and miniature LED lights
• Backup cells for memory or RTC circuits in compact electronics

Key specifications

• Chemistry: Silver oxide
• Nominal voltage: 1.55 V
• Cell form factor: SR920 / SR69 (button cell)
• Typical use: Small, low- to moderate-drain electronic devices
• Operating temperature: Standard ambient and device manufacturer ranges

How to use

Install the battery following the device manufacturer’s instructions, observing correct polarity and using appropriate tools to avoid shorting or damaging contacts. Ensure the battery compartment is clean and free of corrosion before insertion. Replace with a fresh SR920SW-size silver oxide cell when device performance (timekeeping, display brightness, or function) begins to decline. Dispose of used cells according to local battery recycling and hazardous-waste regulations.

Usage recommendations

Store unused batteries in a cool, dry place away from metal objects to prevent shorting. Do not attempt to recharge, disassemble, heat or incinerate silver oxide button cells. For devices used in medical applications, follow the device manufacturer’s guidance and use only recommended battery types and replacement intervals.